Commits

* 'master' of git://repo.or.cz/git-gui: git-gui: Change base version to 0.6. git-gui: Guess our version accurately as a subproject. git-gui: Handle gitgui tags in version gen. git-gui: Generate a version file on demand. git-gui: Rename GIT_VERSION to GITGUI_VERSION. git-gui: Allow gitexecdir, INSTALL to be set by the caller.